NYC-WTC_000162222
EPA staff distributed an environmental laboratory report to federal and city agencies on May 15, 2002.
30 shared non-person entities · 1 shared topics · similarity 0.976
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EPA interim final report on WTC background study, April 2003
Machine-extracted title · confidence 100%Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.
NYC-WTC_000145869–000146029Folder label: “INTERIM FINAL April 2003”
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■D o c o o Table 6-6. Summary of the analytical results for the mineral compounds and total dust from the background study. The table presents the sample —X -tSx size, frequency of detection, minimum and maximum detected concentrations, arithmetic mean, the statistic used, and the upper confidence limit o' tn CD 4^ (UCL) for each compound and matrix sampled. The values in this table were calculated using only the data sets from the common areas for each o analyte. 03
O o 2 Common Area Data Set Range 3 CD Freq. Of Arithmetic ZJ
Matrix n Minimum* Maximum Statistic UCL Anaylte Detection Mean Alpha-quartz Bulk Dust 0 Air 14 4/14 2pg/m’ 9pg/m’ 3.14 pg/m’ 95% Chebyshev (Mean, STD) 5.64 pg/m’ Wipe - All 33 20/33 12.5 pg/ft^ 1880 pg/ft^ 149.9 pg/fV 97.5% Chebyshev (Mean, STD) 508.5 pg/tf Wipe - Counter 7 3/7 12.5 pg/ft^ 220 pgZtf 65.4 pg/ft^ 95% H-UCL 288.5 pg/tf Wipe - Floors 8 7/8 25 pg/tf 1880 pg/ft^ 357.5 pg/ft^ 97.5% Chebyshev (Mean, STD) 1769.4 pg/ff'
Wipe-Walls 18 10/18 25pg/ft^ 270 pg/ft^ 90.6 pg/tf 95% Chebyshev (Mean, STD) 180.1 pg/tf
Calcite Bulk Dust 0 Air 14 0/14 8pg/m’ 10 pg/m’ 8.86 pg/m’ 95% Chebyshev (Mean, STD) 9.75 pg/m’ Wipe - All 34 1/34 50pg/tf 260 pg/tf 98.8.pg/ft2 95% Chebyshev (Mean, STD) 123.4 pg/tf
Wipe - Counter 7 0/7 50pg/tf 100 pg/tf 92.9 pg/tf 95% Chebyshev (Mean, STD) 124.0 pg/tf
Wipe - Floors 9 1/9 50 pg/fV 260 pg/tf 112.2 pg/tf 95% Chebyshev (Mean, STD) 196.2 pg/tf
Wipe - Walls 18 0/18 50 pg/ft^ 100 pg/ft^ 94.4 pg/tf 95% Chebyshev (Mean, STD) 111.1 pg/ft2
Cristobalite Bulk Dust 0 Air 14 0/14 8pg/m’ 10 pg/m’ 8.86 |ig/m’ 95% Chebyshev (Mean, STD) 9.75 pg/m’
* Minimum detected value includes values that may be % of the detection limit Table 6-6
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NYC-WTC_000145947Source: NYC Law Department, mirrored locally
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Transmission of revised asbestos sampling results for residential samples collected November-December 2001.
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